c9700e100e
This patch adds a map of Layout::Node to FormattingState::NodeState. Instead of updating layout nodes incrementally as layout progresses through the formatting contexts, all updates are now written to the corresponding NodeState instead. At the end of layout, FormattingState::commit() is called, which transfers all the values from the NodeState objects to the Node. This will soon allow us to perform completely non-destructive layouts which don't affect the tree. Note that there are many imperfections here, and still many places where we assign to the NodeState, but later read directly from the Node instead. I'm just committing at this stage to make subsequent diffs easier to understand.
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Vector.h>
|
|
#include <LibWeb/Forward.h>
|
|
#include <LibWeb/Layout/BlockContainer.h>
|
|
#include <LibWeb/Layout/FormattingContext.h>
|
|
|
|
namespace Web::Layout {
|
|
|
|
// https://www.w3.org/TR/css-display/#block-formatting-context
|
|
class BlockFormattingContext : public FormattingContext {
|
|
public:
|
|
explicit BlockFormattingContext(FormattingState&, BlockContainer const&, FormattingContext* parent);
|
|
~BlockFormattingContext();
|
|
|
|
virtual void run(Box const&, LayoutMode) override;
|
|
|
|
bool is_initial() const;
|
|
|
|
auto const& left_side_floats() const { return m_left_floats; }
|
|
auto const& right_side_floats() const { return m_right_floats; }
|
|
|
|
static float compute_theoretical_height(FormattingState const&, Box const&);
|
|
void compute_width(Box const&);
|
|
|
|
// https://www.w3.org/TR/css-display/#block-formatting-context-root
|
|
BlockContainer const& root() const { return static_cast<BlockContainer const&>(context_box()); }
|
|
|
|
virtual void parent_context_did_dimension_child_root_box() override;
|
|
|
|
static void compute_height(Box const&, FormattingState&);
|
|
|
|
void add_absolutely_positioned_box(Box const& box) { m_absolutely_positioned_boxes.append(box); }
|
|
|
|
private:
|
|
virtual bool is_block_formatting_context() const final { return true; }
|
|
|
|
void compute_width_for_floating_box(Box const&);
|
|
|
|
void compute_width_for_block_level_replaced_element_in_normal_flow(ReplacedBox const&);
|
|
|
|
void layout_initial_containing_block(LayoutMode);
|
|
|
|
void layout_block_level_children(BlockContainer const&, LayoutMode);
|
|
void layout_inline_children(BlockContainer const&, LayoutMode);
|
|
|
|
void compute_vertical_box_model_metrics(Box const& box, BlockContainer const& containing_block);
|
|
void place_block_level_element_in_normal_flow_horizontally(Box const& child_box, BlockContainer const&);
|
|
void place_block_level_element_in_normal_flow_vertically(Box const& child_box, BlockContainer const&);
|
|
|
|
void layout_floating_child(Box const& child, BlockContainer const& containing_block);
|
|
|
|
void apply_transformations_to_children(Box const&);
|
|
|
|
enum class FloatSide {
|
|
Left,
|
|
Right,
|
|
};
|
|
|
|
struct FloatSideData {
|
|
Vector<Box const&> boxes;
|
|
float y_offset { 0 };
|
|
};
|
|
|
|
FloatSideData m_left_floats;
|
|
FloatSideData m_right_floats;
|
|
|
|
Vector<Box const&> m_absolutely_positioned_boxes;
|
|
|
|
bool m_was_notified_after_parent_dimensioned_my_root_box { false };
|
|
};
|
|
|
|
}
|